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What is the curiously recurring template pattern (CRTP)?
... You can write
int main()
{
Apple a1;
Apple a2;
a1.size = 10;
a2.size = 10;
if(a1 == a2) //the compiler won't complain!
{
}
}
This could seem that you would write less if you just wrote operator == for Apple, but imagine that the Equality template would provide not...
How can I reliably get an object's address when operator& is overloaded?
...
102
Update: in C++11, one may use std::addressof instead of boost::addressof.
Let us first copy ...
Iterating through a list in reverse order in java
...
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edited Jan 20 '10 at 15:54
answered Jan 20 '10 at 15:34
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Optimising Android application before release [closed]
...
+100
At some point you are going to get to the point where using known tricks will hit their limits. The best thing to do at this point is...
Facebook database design?
...
90
Keep a friend table that holds the UserID and then the UserID of the friend (we will call it Fri...
How can I mock dependencies for unit testing in RequireJS?
...ext for your test where you can simply mock your dependencies:
var cnt = 0;
function createContext(stubs) {
cnt++;
var map = {};
var i18n = stubs.i18n;
stubs.i18n = {
load: sinon.spy(function(name, req, onLoad) {
onLoad(i18n);
})
};
_.each(stubs, function(value, key) {
...
Difference between null and empty (“”) Java String
... can still invoke methods or functions on it like
a.length()
a.substring(0, 1)
and so on.
If the String equals null, like b, Java would throw a NullPointerException if you tried invoking, say:
b.length()
If the difference you are wondering about is == versus equals, it's this:
== compares ...
Removing duplicate rows in Notepad++
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answered Oct 18 '10 at 10:46
Colin PickardColin Pickard
42.2k1111 gold badges9191 silver badges142142 bronze badges
...
How to clear variables in ipython?
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208
%reset seems to clear defined variables.
...
Image comparison - fast algorithm
...tially the hardest to implement.
Keypoint Matching
Better than picking 100 random points is picking 100 important points. Certain parts of an image have more information than others (particularly at edges and corners), and these are the ones you'll want to use for smart image matching. Google "...